@
TomSpot - if FAQ doesn't help, and reinstall of latest version doesn't work, do this:
Press
WinKey+R, type
calibre-debug -g, press
Enter, this will open a command window and display some information, cut and paste that information here, viz:
Spoiler:
calibre 3.38.1 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.17134-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.17134')
Python 2.7.15+
Windows: ('10', '10.0.17134', 'SP0', u'Multiprocessor Free')
Interface language: None
DEBUG: 0.0 GetFileName::__init__.py - loading translations
DEBUG: 0.0 GetFileName::__init__.py - loading translations
Successfully initialized third party plugins: CalibreSpy (1, 0, 66) && Barnes & Noble (1, 2, 15) && Generate Cover (1, 5, 21) && Extract ISBN (1, 4, 4) && EpubSplit (2, 6, 0) && Drop Search Results (1, 0, 8) && Favourites Menu (1, 0, 4) && GetFileName (0, 0, 13) && Beam Ebooks (1, 0, 0) && Quality Check (1, 9, 11) && User Category (1, 5, 3) && Find Duplicates (1, 6, 3) && Modify ePub (1, 3, 13) && Count Pages (1, 8, 2) && View Manager (1, 3, 2) && Job Spy (1, 0, 137) && Resize Cover (1, 0, 3) && Reading List (1, 6, 6) && Goodreads (1, 4, 0)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 120.0 x 120.0
physicalDpi: 123.385199241 x 123.567567568
Using calibre Qt style: True
[0.00] Starting up...
[0.05] Initializing db...
[0.19] db initialized
[0.19] Constructing main UI...
libpng warning: iCCP: known incorrect sRGB profile
CalibreSpy: initialization_complete
Job Spy has begun initialization...
Calibre, and hence Job Spy, was gracefully shut down last time? True
Last time daemon started: never
Last time daemon failed: never
Total daemon starts inception_to_date: 0
Total daemon failures inception-to-date: 0
libpng warning: iCCP: known incorrect sRGB profile
Job Spy has finished initialization...
[2.76] main UI initialized...
[2.76] Started up in 2.76 seconds with 5 books
BR